ReadonlydomainReadonlyfragmentReadonlysourceReadonlytexturesReachable sampler names, reflection order (§33).
Optional ReadonlyuniformReadonlyuniformsReachable uniforms, reflection order (§33).
ReadonlyusesWhether any reachable node reads §9 render time.
Readonlyvertex
What the emitter hands the program class — source plus binding metadata.